Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics

Glaeser, Horst; Rohatgi, Upendra Singh

doi:10.1016/j.nucengdes.2019.110226

Title: Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics

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Abstract

The limitation of gas-liquid counter-current flow is important for getting coolant to the core preventing heat-up. To illustrate the scaling dependence of counter-current flow in the downcomer, the upper core tie plate and the hot leg, some results are presented. Based on a derivation of the counter-current flow equations for vertical and horizontal flows, the scaling ability of existing correlations is shown for homogeneous vertical counter-current flow (Kutateladze-type equation) and separated horizontal flow in the hot leg during reflux-condenser conditions (Wallis equation). The large reactor scale heterogeneous counter-current flow in the downcomer and at the upper core tie-plate needed an extension of the Kutateladze-type equation. Finally, Bankoff suggested that for CCFL in perforated plates such as upper tie plate, a parameter that is a combination of actual length scale (Wallis parameter) and Laplace constant (Kutateladze parameter) will be required.

Authors:

Glaeser, Horst ^[1]; Rohatgi, Upendra Singh ^[2]

Consultant (Germany)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Publication Date:: Sun Dec 01 00:00:00 EST 2019

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA), Office of Nonproliferation and Verification Research and Development (NA-22)

OSTI Identifier:: 1547288

Report Number(s):: BNL-211926-2019-JAAM
Journal ID: ISSN 0029-5493

Grant/Contract Number:: SC0012704

Resource Type:: Accepted Manuscript

Journal Name:: Nuclear Engineering and Design

Additional Journal Information:: Journal Volume: 354; Journal Issue: C; Journal ID: ISSN 0029-5493

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Vertical homogeneous counter-current flow; vertical heterogeneous horizontal counter-current flow; horizontal separated counter-current flow; core bypass; emergency core cooling; scaling effects

Citation Formats


                    Glaeser, Horst, and Rohatgi, Upendra Singh. Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics.  United States: N. p., 2019. 
Web.  doi:10.1016/j.nucengdes.2019.110226.

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                    Glaeser, Horst, & Rohatgi, Upendra Singh. Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics.  United States.  https://doi.org/10.1016/j.nucengdes.2019.110226

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                    Glaeser, Horst, and Rohatgi, Upendra Singh. Sun .  
"Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics".  United States.  https://doi.org/10.1016/j.nucengdes.2019.110226.  https://www.osti.gov/servlets/purl/1547288.

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@article{osti_1547288,

  title        = {Scaling ability of the counter-current flow limitation (CCFL) correlations for application to reactor thermal hydraulics},

  author       = {Glaeser, Horst and Rohatgi, Upendra Singh},

  abstractNote = {The limitation of gas-liquid counter-current flow is important for getting coolant to the core preventing heat-up. To illustrate the scaling dependence of counter-current flow in the downcomer, the upper core tie plate and the hot leg, some results are presented. Based on a derivation of the counter-current flow equations for vertical and horizontal flows, the scaling ability of existing correlations is shown for homogeneous vertical counter-current flow (Kutateladze-type equation) and separated horizontal flow in the hot leg during reflux-condenser conditions (Wallis equation). The large reactor scale heterogeneous counter-current flow in the downcomer and at the upper core tie-plate needed an extension of the Kutateladze-type equation. Finally, Bankoff suggested that for CCFL in perforated plates such as upper tie plate, a parameter that is a combination of actual length scale (Wallis parameter) and Laplace constant (Kutateladze parameter) will be required.},

  doi          = {10.1016/j.nucengdes.2019.110226},

  journal      = {Nuclear Engineering and Design},

  number       = C,

  volume       = 354,

  place        = {United States},

  year         = {Sun Dec 01 00:00:00 EST 2019},

  month        = {Sun Dec 01 00:00:00 EST 2019}

}

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